Well, my rejection letter came from Stanford, but my POI chased it with an email explaining the madness.
Asked him if he could offer come criticism of my app, so I can be more aware of areas that I can work to improve my image, and he said that he couldn't, because my file was great. As for why I was still rejected, and I suspect this is relevant to many of us...
"But the competition for admission this year was just brutal. Not only did we have an abundance of brilliant candidates, we also faced a reduction in the total number of places we were allowed to offer -- in fact, the lowest total in our history. We are looking at just a dozen new admits into our PhD program next year -- and that isn't a dozen Americanists, but a dozen students overall, spread between the department's thirteen different PhD granting tracks. In these circumstances, we had to leave many abundantly qualified candidates behind, particularly in the US field, which always receives the largest number of applications."